CUPERTINO (California) - Apple is working on a new audio file format that will offer "adaptive streaming" to provide high- or low-quality files to users of its iCloud service. The new format could mean that users can get "high-definition" audio by downloading to an iOS device. Alternatively, it could offer a streaming service. The new system would adjust itself to the bandwidth and storage available on the receiving device. It is believed that Apple will use the new file type to upgrade its iTunes Match service, which allows users to re-download music from iCloud to their Apple devices. A source with inside knowledge of the process says Apple has asked a London studio to prepare audio files for a new streaming format that will adapt to bandwidth or hardware capabilities. "All of a sudden, all your audio from iTunes is in HD rather than AAC. Users wouldn't have to touch a t...